linux-kernel - Re: [PATCH v2 26/30] dmaengine: idxd: Assign parent for event

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Message-ID: <1a397659-2163-4582-ac5c-2eab7f30c925@intel.com>
Date: Fri, 12 Apr 2024 09:27:17 -0700
From: Dave Jiang <dave.jiang@...el.com>
To: Jonathan Cameron <Jonathan.Cameron@...wei.com>,
 Mark Rutland <mark.rutland@....com>, Peter Zijlstra <peterz@...radead.org>,
 Ingo Molnar <mingo@...hat.com>, Arnaldo Carvalho de Melo <acme@...nel.org>,
 Will Deacon <will@...nel.org>, linux-kernel@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, gregkh@...uxfoundation.org
Cc: linuxarm@...wei.com, Shaokun Zhang <zhangshaokun@...ilicon.com>,
 Yicong Yang <yangyicong@...ilicon.com>, Jiucheng Xu
 <jiucheng.xu@...ogic.com>, Khuong Dinh <khuong@...amperecomputing.com>,
 Atish Patra <atishp@...shpatra.org>, Anup Patel <anup@...infault.org>,
 Andy Gross <agross@...nel.org>, Bjorn Andersson <andersson@...nel.org>,
 Frank Li <Frank.li@....com>, Shuai Xue <xueshuai@...ux.alibaba.com>,
 Vineet Gupta <vgupta@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
 Fenghua Yu <fenghua.yu@...el.com>, Wu Hao <hao.wu@...el.com>,
 Tom Rix <trix@...hat.com>, linux-fpga@...r.kernel.org,
 Suzuki K Poulose <suzuki.poulose@....com>,
 Liang Kan <kan.liang@...ux.intel.com>
Subject: Re: [PATCH v2 26/30] dmaengine: idxd: Assign parent for event_source
 device



On 4/12/24 9:10 AM, Jonathan Cameron wrote:
> Currently the PMU device appears directly under /sys/devices/
> Only root busses should appear there, so instead assign the pmu->dev
> parent to be the iDXD PCI Device.
> 
> Link: https://lore.kernel.org/linux-cxl/ZCLI9A40PJsyqAmq@kroah.com/
> Cc: Fenghua Yu <fenghua.yu@...el.com>
> Cc: Dave Jiang <dave.jiang@...el.com>
> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>

Reviewed-by: Dave Jiang <dave.jiang@...el.com>
> ---
>  drivers/dma/idxd/perfmon.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/dma/idxd/perfmon.c b/drivers/dma/idxd/perfmon.c
> index fdda6d604262..fbb586eed0b3 100644
> --- a/drivers/dma/idxd/perfmon.c
> +++ b/drivers/dma/idxd/perfmon.c
> @@ -477,6 +477,7 @@ static void idxd_pmu_init(struct idxd_pmu *idxd_pmu)
>  	}
>  
>  	idxd_pmu->pmu.name		= idxd_pmu->name;
> +	idxd_pmu->pmu.parent		= &idxd_pmu->idxd->pdev->dev;
>  	idxd_pmu->pmu.attr_groups	= perfmon_attr_groups;
>  	idxd_pmu->pmu.task_ctx_nr	= perf_invalid_context;
>  	idxd_pmu->pmu.event_init	= perfmon_pmu_event_init;